Spark arrester



Sept. 20, 1955 s 2,718,278

SPARK ARRESTER Filed Sept. 1, 1953 YINVENTOR. EDM/AQD 45426510" Arrow/245 United States Patent SPARK ARRESTER Edward A. Sargent, Arlington, N. J.

Application September 1, 1953, Serial No. 377,937

1 Claim. (Cl. 18351) This invention relates to spark arresters for the top of chimneys.

Known spark arresters for the top of chimneys are made and shipped as preassembled units ready for placement on the top of chimneys. Being made of fragile material such arresters are frequently broken in transit from the factory to the situs of the work.

It is an object of the instant invention to provide a spark arrester which can be shipped knocked down to the situs of the work and with but slight danger from breakage.

A further object is to decrease costs from breakage in building construction.

Other objects of the instant invention will become apparent in the course of the following specification.

In the attainment of the aforesaid objectives, subject spark arrester is made in two forms. Each form is constituted of a bottom portion and a cap. In each form, the bottom portion is constituted of upwardly and inwardly directed front and back and side members which are interlocked along corresponding edges. Each member is provided with apertures for the egress of the smoke and over the top of the member of the first form is a cap made from a plurality of spaced segments. In the second form the cap is a unitary member in which spaced apertures are made.

The invention will appear more clearly from the following detailed description when taken in conjunction with the accompanying drawings showing by way of example the prefered forms of the inventive concept.

In the drawings:

Figures 1-5 show the first form of the spark arrester constructed in accordance with the principles of this invention, and in which:

Figure 1 is an elevational view of the spark arrester;

Figure 2 is a top view of the spark arrester shown in Figure 1;

Figure 3 is an enlarged sectional view along the line 33 of Figure 2;

Figure 4 is a sectional view along the line 4-4 of Figure 1; and

Figure 5 is a sectional view along the line 55 of Figure 1.

Figure 6 is an elevational view in part section of the second form of the spark arrester.

Referring now in greater detail to the first form of the spark arrester shown in Figures 1-5, reference numeral 10 indicates the arrester.

The spark arrester 10 is constituted of the bottom portion 11, and a cap 12.

The bottom portion 11 is constituted of the front member 13, the back member 14, and the side members 2,718,278 Patented Sept. 20, 1955 "ice 15 and 16. Each member is made from any suitable fire resistant material and is substantially flat with inwardly and upwardly tapering edges, the edges being interlocking as most clearly shown by 17, 18 in Figure 4. Each member further has spaced apertures 19 formed therein. When assembled at the situs of the chimney, the four members constitute a body substantially in the shape of a frustum of a pyramid.

Surmounting the top of the members is the cap 12. The cap 12 is made of the four segments 21, 22, 23, 24 and, of course, from fire resistant material. Each segment has a similar depending flange 25 for fitting over the top edges of the members and when assembled leave the irregular spaces 26, 27, 28, 29 (Fig. 5) between consecutive segments.

In operation:

The members 13-16 are shipped knocked down from the factory to reduce breakage. At the situs of the chimney (not shown) and in which an inner ledge of masonry is provided around the periphery of the opening, the bottom edges of the members are inserted with corresponding edges interlocked and held together with a layer of cement 20 (Fig. 4). The segments 2124 of the cap 12 are then placed over the upper edges of the members and held in place with cement. The free edges are inwardly directed and spaced apart to form the openings 2629 (Fig. 5).

Referring now to the second form of the spark arrester shownin Figure 6, 30 indicates the bottom portion and 31 the cap.

The bottom portion 30 is substantially the same as the previously described bottom portion of the first form.

The cap 31, however, differs from the previously described cap of the first form in that it is a unitary member having a depending flange 32 formed around the periphery thereof which is fitted over the top edges of the bottom portion as illustrated. To provide egress for the smoke and to increase the draught, spaced apertures 33 are provided.

The operation of the spark arrester of the second form will be apparent from the foregoing.

While there is above described but two forms of the spark arrester it is possible to produce still other forms within the scope of the appended claim.

What is claimed is:

A spark arrester for the top of a chimney, said spark arrester comprising four separate members of the same size, each of said members being flat and having inwardly and upwardly tapering stepped edges, whereby said members when assembled interlock to form the frustum of a pyramid, each of said members having a plurality of elongated holes extending horizontally at different levels, and a cap disposed over the top edges of said members and having a flange fitting over said top edges, said cap being substantially flat and having a plurality of spaced apertures formed therein.

References Cited in the file of this patent UNITED STATES PATETNS 833,019 Bice Oct. 9, 1906 1,622,431 Feigenbaum Mar. 29, 1927 1,962,633 Carrington June 12, 1934 2,505,123 Lafirey et al. Apr. 25, 1950 2,598,603 Richtarsic May 27, 1952 

